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The 10 wealthiest couples in the world

These 10 power couples are each worth tens of billions of dollars, making Beyonce and Jay-Z look middle class in comparison.

5.  Charles and Elizabeth Koch

  • Net worth: $47.4 billion

Charles Koch began working in the family business founded by his father in the 1960s and then took over as chairman and CEO in 1967, after his father's death.

He and his wife Elizabeth married in 1972 and have two children.

Related: The richest person in all 50 states

Like his brother David, Charles is actively involved in a range of philanthropic work.

He founded or helped build various organizations, including the Institute for Humane Studies, the Cato Institute and the Mercatus Center at George Mason University.

Source: Wealth-X
  @AlannaPetroff - Last updated July 24 2015 10:51 AM ET

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